Pull suspend into release branch
[linux-2.6.git] / drivers / acpi / utilities / utglobal.c
1 /******************************************************************************
2  *
3  * Module Name: utglobal - Global variables for the ACPI subsystem
4  *
5  *****************************************************************************/
6
7 /*
8  * Copyright (C) 2000 - 2007, R. Byron Moore
9  * All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions, and the following disclaimer,
16  *    without modification.
17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18  *    substantially similar to the "NO WARRANTY" disclaimer below
19  *    ("Disclaimer") and any redistribution must be conditioned upon
20  *    including a substantially similar Disclaimer requirement for further
21  *    binary redistribution.
22  * 3. Neither the names of the above-listed copyright holders nor the names
23  *    of any contributors may be used to endorse or promote products derived
24  *    from this software without specific prior written permission.
25  *
26  * Alternatively, this software may be distributed under the terms of the
27  * GNU General Public License ("GPL") version 2 as published by the Free
28  * Software Foundation.
29  *
30  * NO WARRANTY
31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41  * POSSIBILITY OF SUCH DAMAGES.
42  */
43
44 #define DEFINE_ACPI_GLOBALS
45
46 #include <acpi/acpi.h>
47 #include <acpi/acnamesp.h>
48
49 ACPI_EXPORT_SYMBOL(acpi_gbl_FADT)
50 #define _COMPONENT          ACPI_UTILITIES
51     ACPI_MODULE_NAME("utglobal")
52
53 /*******************************************************************************
54  *
55  * Static global variable initialization.
56  *
57  ******************************************************************************/
58 /*
59  * We want the debug switches statically initialized so they
60  * are already set when the debugger is entered.
61  */
62 /* Debug switch - level and trace mask */
63 u32 acpi_dbg_level = ACPI_DEBUG_DEFAULT;
64
65 /* Debug switch - layer (component) mask */
66
67 u32 acpi_dbg_layer = ACPI_COMPONENT_DEFAULT | ACPI_ALL_DRIVERS;
68 u32 acpi_gbl_nesting_level = 0;
69
70 /* Debugger globals */
71
72 u8 acpi_gbl_db_terminate_threads = FALSE;
73 u8 acpi_gbl_abort_method = FALSE;
74 u8 acpi_gbl_method_executing = FALSE;
75
76 /* System flags */
77
78 u32 acpi_gbl_startup_flags = 0;
79
80 /* System starts uninitialized */
81
82 u8 acpi_gbl_shutdown = TRUE;
83
84 const char *acpi_gbl_sleep_state_names[ACPI_S_STATE_COUNT] = {
85         "\\_S0_",
86         "\\_S1_",
87         "\\_S2_",
88         "\\_S3_",
89         "\\_S4_",
90         "\\_S5_"
91 };
92
93 const char *acpi_gbl_highest_dstate_names[4] = {
94         "_S1D",
95         "_S2D",
96         "_S3D",
97         "_S4D"
98 };
99
100 /*******************************************************************************
101  *
102  * FUNCTION:    acpi_format_exception
103  *
104  * PARAMETERS:  Status       - The acpi_status code to be formatted
105  *
106  * RETURN:      A string containing the exception text. A valid pointer is
107  *              always returned.
108  *
109  * DESCRIPTION: This function translates an ACPI exception into an ASCII string
110  *              It is here instead of utxface.c so it is always present.
111  *
112  ******************************************************************************/
113
114 const char *acpi_format_exception(acpi_status status)
115 {
116         const char *exception = NULL;
117
118         ACPI_FUNCTION_ENTRY();
119
120         exception = acpi_ut_validate_exception(status);
121         if (!exception) {
122
123                 /* Exception code was not recognized */
124
125                 ACPI_ERROR((AE_INFO,
126                             "Unknown exception code: 0x%8.8X", status));
127
128                 exception = "UNKNOWN_STATUS_CODE";
129         }
130
131         return (ACPI_CAST_PTR(const char, exception));
132 }
133
134 ACPI_EXPORT_SYMBOL(acpi_format_exception)
135
136 /*******************************************************************************
137  *
138  * Namespace globals
139  *
140  ******************************************************************************/
141 /*
142  * Predefined ACPI Names (Built-in to the Interpreter)
143  *
144  * NOTES:
145  * 1) _SB_ is defined to be a device to allow \_SB_._INI to be run
146  *    during the initialization sequence.
147  * 2) _TZ_ is defined to be a thermal zone in order to allow ASL code to
148  *    perform a Notify() operation on it.
149  */
150 const struct acpi_predefined_names acpi_gbl_pre_defined_names[] = {
151         {"_GPE", ACPI_TYPE_LOCAL_SCOPE, NULL},
152         {"_PR_", ACPI_TYPE_LOCAL_SCOPE, NULL},
153         {"_SB_", ACPI_TYPE_DEVICE, NULL},
154         {"_SI_", ACPI_TYPE_LOCAL_SCOPE, NULL},
155         {"_TZ_", ACPI_TYPE_THERMAL, NULL},
156         {"_REV", ACPI_TYPE_INTEGER, (char *)ACPI_CA_SUPPORT_LEVEL},
157         {"_OS_", ACPI_TYPE_STRING, ACPI_OS_NAME},
158         {"_GL_", ACPI_TYPE_MUTEX, (char *)1},
159
160 #if !defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY)
161         {"_OSI", ACPI_TYPE_METHOD, (char *)1},
162 #endif
163
164         /* Table terminator */
165
166         {NULL, ACPI_TYPE_ANY, NULL}
167 };
168
169 /*
170  * Properties of the ACPI Object Types, both internal and external.
171  * The table is indexed by values of acpi_object_type
172  */
173 const u8 acpi_gbl_ns_properties[] = {
174         ACPI_NS_NORMAL,         /* 00 Any              */
175         ACPI_NS_NORMAL,         /* 01 Number           */
176         ACPI_NS_NORMAL,         /* 02 String           */
177         ACPI_NS_NORMAL,         /* 03 Buffer           */
178         ACPI_NS_NORMAL,         /* 04 Package          */
179         ACPI_NS_NORMAL,         /* 05 field_unit       */
180         ACPI_NS_NEWSCOPE,       /* 06 Device           */
181         ACPI_NS_NORMAL,         /* 07 Event            */
182         ACPI_NS_NEWSCOPE,       /* 08 Method           */
183         ACPI_NS_NORMAL,         /* 09 Mutex            */
184         ACPI_NS_NORMAL,         /* 10 Region           */
185         ACPI_NS_NEWSCOPE,       /* 11 Power            */
186         ACPI_NS_NEWSCOPE,       /* 12 Processor        */
187         ACPI_NS_NEWSCOPE,       /* 13 Thermal          */
188         ACPI_NS_NORMAL,         /* 14 buffer_field     */
189         ACPI_NS_NORMAL,         /* 15 ddb_handle       */
190         ACPI_NS_NORMAL,         /* 16 Debug Object     */
191         ACPI_NS_NORMAL,         /* 17 def_field        */
192         ACPI_NS_NORMAL,         /* 18 bank_field       */
193         ACPI_NS_NORMAL,         /* 19 index_field      */
194         ACPI_NS_NORMAL,         /* 20 Reference        */
195         ACPI_NS_NORMAL,         /* 21 Alias            */
196         ACPI_NS_NORMAL,         /* 22 method_alias     */
197         ACPI_NS_NORMAL,         /* 23 Notify           */
198         ACPI_NS_NORMAL,         /* 24 Address Handler  */
199         ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,       /* 25 Resource Desc    */
200         ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,       /* 26 Resource Field   */
201         ACPI_NS_NEWSCOPE,       /* 27 Scope            */
202         ACPI_NS_NORMAL,         /* 28 Extra            */
203         ACPI_NS_NORMAL,         /* 29 Data             */
204         ACPI_NS_NORMAL          /* 30 Invalid          */
205 };
206
207 /* Hex to ASCII conversion table */
208
209 static const char acpi_gbl_hex_to_ascii[] = {
210         '0', '1', '2', '3', '4', '5', '6', '7',
211         '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
212 };
213
214 /*******************************************************************************
215  *
216  * FUNCTION:    acpi_ut_hex_to_ascii_char
217  *
218  * PARAMETERS:  Integer             - Contains the hex digit
219  *              Position            - bit position of the digit within the
220  *                                    integer (multiple of 4)
221  *
222  * RETURN:      The converted Ascii character
223  *
224  * DESCRIPTION: Convert a hex digit to an Ascii character
225  *
226  ******************************************************************************/
227
228 char acpi_ut_hex_to_ascii_char(acpi_integer integer, u32 position)
229 {
230
231         return (acpi_gbl_hex_to_ascii[(integer >> position) & 0xF]);
232 }
233
234 /******************************************************************************
235  *
236  * Event and Hardware globals
237  *
238  ******************************************************************************/
239
240 struct acpi_bit_register_info acpi_gbl_bit_register_info[ACPI_NUM_BITREG] = {
241         /* Name                                     Parent Register             Register Bit Position                   Register Bit Mask       */
242
243         /* ACPI_BITREG_TIMER_STATUS         */ {ACPI_REGISTER_PM1_STATUS,
244                                                 ACPI_BITPOSITION_TIMER_STATUS,
245                                                 ACPI_BITMASK_TIMER_STATUS},
246         /* ACPI_BITREG_BUS_MASTER_STATUS    */ {ACPI_REGISTER_PM1_STATUS,
247                                                 ACPI_BITPOSITION_BUS_MASTER_STATUS,
248                                                 ACPI_BITMASK_BUS_MASTER_STATUS},
249         /* ACPI_BITREG_GLOBAL_LOCK_STATUS   */ {ACPI_REGISTER_PM1_STATUS,
250                                                 ACPI_BITPOSITION_GLOBAL_LOCK_STATUS,
251                                                 ACPI_BITMASK_GLOBAL_LOCK_STATUS},
252         /* ACPI_BITREG_POWER_BUTTON_STATUS  */ {ACPI_REGISTER_PM1_STATUS,
253                                                 ACPI_BITPOSITION_POWER_BUTTON_STATUS,
254                                                 ACPI_BITMASK_POWER_BUTTON_STATUS},
255         /* ACPI_BITREG_SLEEP_BUTTON_STATUS  */ {ACPI_REGISTER_PM1_STATUS,
256                                                 ACPI_BITPOSITION_SLEEP_BUTTON_STATUS,
257                                                 ACPI_BITMASK_SLEEP_BUTTON_STATUS},
258         /* ACPI_BITREG_RT_CLOCK_STATUS      */ {ACPI_REGISTER_PM1_STATUS,
259                                                 ACPI_BITPOSITION_RT_CLOCK_STATUS,
260                                                 ACPI_BITMASK_RT_CLOCK_STATUS},
261         /* ACPI_BITREG_WAKE_STATUS          */ {ACPI_REGISTER_PM1_STATUS,
262                                                 ACPI_BITPOSITION_WAKE_STATUS,
263                                                 ACPI_BITMASK_WAKE_STATUS},
264         /* ACPI_BITREG_PCIEXP_WAKE_STATUS   */ {ACPI_REGISTER_PM1_STATUS,
265                                                 ACPI_BITPOSITION_PCIEXP_WAKE_STATUS,
266                                                 ACPI_BITMASK_PCIEXP_WAKE_STATUS},
267
268         /* ACPI_BITREG_TIMER_ENABLE         */ {ACPI_REGISTER_PM1_ENABLE,
269                                                 ACPI_BITPOSITION_TIMER_ENABLE,
270                                                 ACPI_BITMASK_TIMER_ENABLE},
271         /* ACPI_BITREG_GLOBAL_LOCK_ENABLE   */ {ACPI_REGISTER_PM1_ENABLE,
272                                                 ACPI_BITPOSITION_GLOBAL_LOCK_ENABLE,
273                                                 ACPI_BITMASK_GLOBAL_LOCK_ENABLE},
274         /* ACPI_BITREG_POWER_BUTTON_ENABLE  */ {ACPI_REGISTER_PM1_ENABLE,
275                                                 ACPI_BITPOSITION_POWER_BUTTON_ENABLE,
276                                                 ACPI_BITMASK_POWER_BUTTON_ENABLE},
277         /* ACPI_BITREG_SLEEP_BUTTON_ENABLE  */ {ACPI_REGISTER_PM1_ENABLE,
278                                                 ACPI_BITPOSITION_SLEEP_BUTTON_ENABLE,
279                                                 ACPI_BITMASK_SLEEP_BUTTON_ENABLE},
280         /* ACPI_BITREG_RT_CLOCK_ENABLE      */ {ACPI_REGISTER_PM1_ENABLE,
281                                                 ACPI_BITPOSITION_RT_CLOCK_ENABLE,
282                                                 ACPI_BITMASK_RT_CLOCK_ENABLE},
283         /* ACPI_BITREG_WAKE_ENABLE          */ {ACPI_REGISTER_PM1_ENABLE, 0, 0},
284         /* ACPI_BITREG_PCIEXP_WAKE_DISABLE  */ {ACPI_REGISTER_PM1_ENABLE,
285                                                 ACPI_BITPOSITION_PCIEXP_WAKE_DISABLE,
286                                                 ACPI_BITMASK_PCIEXP_WAKE_DISABLE},
287
288         /* ACPI_BITREG_SCI_ENABLE           */ {ACPI_REGISTER_PM1_CONTROL,
289                                                 ACPI_BITPOSITION_SCI_ENABLE,
290                                                 ACPI_BITMASK_SCI_ENABLE},
291         /* ACPI_BITREG_BUS_MASTER_RLD       */ {ACPI_REGISTER_PM1_CONTROL,
292                                                 ACPI_BITPOSITION_BUS_MASTER_RLD,
293                                                 ACPI_BITMASK_BUS_MASTER_RLD},
294         /* ACPI_BITREG_GLOBAL_LOCK_RELEASE  */ {ACPI_REGISTER_PM1_CONTROL,
295                                                 ACPI_BITPOSITION_GLOBAL_LOCK_RELEASE,
296                                                 ACPI_BITMASK_GLOBAL_LOCK_RELEASE},
297         /* ACPI_BITREG_SLEEP_TYPE_A         */ {ACPI_REGISTER_PM1_CONTROL,
298                                                 ACPI_BITPOSITION_SLEEP_TYPE_X,
299                                                 ACPI_BITMASK_SLEEP_TYPE_X},
300         /* ACPI_BITREG_SLEEP_TYPE_B         */ {ACPI_REGISTER_PM1_CONTROL,
301                                                 ACPI_BITPOSITION_SLEEP_TYPE_X,
302                                                 ACPI_BITMASK_SLEEP_TYPE_X},
303         /* ACPI_BITREG_SLEEP_ENABLE         */ {ACPI_REGISTER_PM1_CONTROL,
304                                                 ACPI_BITPOSITION_SLEEP_ENABLE,
305                                                 ACPI_BITMASK_SLEEP_ENABLE},
306
307         /* ACPI_BITREG_ARB_DIS              */ {ACPI_REGISTER_PM2_CONTROL,
308                                                 ACPI_BITPOSITION_ARB_DISABLE,
309                                                 ACPI_BITMASK_ARB_DISABLE}
310 };
311
312 struct acpi_fixed_event_info acpi_gbl_fixed_event_info[ACPI_NUM_FIXED_EVENTS] = {
313         /* ACPI_EVENT_PMTIMER       */ {ACPI_BITREG_TIMER_STATUS,
314                                         ACPI_BITREG_TIMER_ENABLE,
315                                         ACPI_BITMASK_TIMER_STATUS,
316                                         ACPI_BITMASK_TIMER_ENABLE},
317         /* ACPI_EVENT_GLOBAL        */ {ACPI_BITREG_GLOBAL_LOCK_STATUS,
318                                         ACPI_BITREG_GLOBAL_LOCK_ENABLE,
319                                         ACPI_BITMASK_GLOBAL_LOCK_STATUS,
320                                         ACPI_BITMASK_GLOBAL_LOCK_ENABLE},
321         /* ACPI_EVENT_POWER_BUTTON  */ {ACPI_BITREG_POWER_BUTTON_STATUS,
322                                         ACPI_BITREG_POWER_BUTTON_ENABLE,
323                                         ACPI_BITMASK_POWER_BUTTON_STATUS,
324                                         ACPI_BITMASK_POWER_BUTTON_ENABLE},
325         /* ACPI_EVENT_SLEEP_BUTTON  */ {ACPI_BITREG_SLEEP_BUTTON_STATUS,
326                                         ACPI_BITREG_SLEEP_BUTTON_ENABLE,
327                                         ACPI_BITMASK_SLEEP_BUTTON_STATUS,
328                                         ACPI_BITMASK_SLEEP_BUTTON_ENABLE},
329         /* ACPI_EVENT_RTC           */ {ACPI_BITREG_RT_CLOCK_STATUS,
330                                         ACPI_BITREG_RT_CLOCK_ENABLE,
331                                         ACPI_BITMASK_RT_CLOCK_STATUS,
332                                         ACPI_BITMASK_RT_CLOCK_ENABLE},
333 };
334
335 /*******************************************************************************
336  *
337  * FUNCTION:    acpi_ut_get_region_name
338  *
339  * PARAMETERS:  None.
340  *
341  * RETURN:      Status
342  *
343  * DESCRIPTION: Translate a Space ID into a name string (Debug only)
344  *
345  ******************************************************************************/
346
347 /* Region type decoding */
348
349 const char *acpi_gbl_region_types[ACPI_NUM_PREDEFINED_REGIONS] = {
350         "SystemMemory",
351         "SystemIO",
352         "PCI_Config",
353         "EmbeddedControl",
354         "SMBus",
355         "CMOS",
356         "PCIBARTarget",
357         "DataTable"
358 };
359
360 char *acpi_ut_get_region_name(u8 space_id)
361 {
362
363         if (space_id >= ACPI_USER_REGION_BEGIN) {
364                 return ("UserDefinedRegion");
365         } else if (space_id >= ACPI_NUM_PREDEFINED_REGIONS) {
366                 return ("InvalidSpaceId");
367         }
368
369         return (ACPI_CAST_PTR(char, acpi_gbl_region_types[space_id]));
370 }
371
372 /*******************************************************************************
373  *
374  * FUNCTION:    acpi_ut_get_event_name
375  *
376  * PARAMETERS:  None.
377  *
378  * RETURN:      Status
379  *
380  * DESCRIPTION: Translate a Event ID into a name string (Debug only)
381  *
382  ******************************************************************************/
383
384 /* Event type decoding */
385
386 static const char *acpi_gbl_event_types[ACPI_NUM_FIXED_EVENTS] = {
387         "PM_Timer",
388         "GlobalLock",
389         "PowerButton",
390         "SleepButton",
391         "RealTimeClock",
392 };
393
394 char *acpi_ut_get_event_name(u32 event_id)
395 {
396
397         if (event_id > ACPI_EVENT_MAX) {
398                 return ("InvalidEventID");
399         }
400
401         return (ACPI_CAST_PTR(char, acpi_gbl_event_types[event_id]));
402 }
403
404 /*******************************************************************************
405  *
406  * FUNCTION:    acpi_ut_get_type_name
407  *
408  * PARAMETERS:  None.
409  *
410  * RETURN:      Status
411  *
412  * DESCRIPTION: Translate a Type ID into a name string (Debug only)
413  *
414  ******************************************************************************/
415
416 /*
417  * Elements of acpi_gbl_ns_type_names below must match
418  * one-to-one with values of acpi_object_type
419  *
420  * The type ACPI_TYPE_ANY (Untyped) is used as a "don't care" when searching;
421  * when stored in a table it really means that we have thus far seen no
422  * evidence to indicate what type is actually going to be stored for this entry.
423  */
424 static const char acpi_gbl_bad_type[] = "UNDEFINED";
425
426 /* Printable names of the ACPI object types */
427
428 static const char *acpi_gbl_ns_type_names[] = {
429         /* 00 */ "Untyped",
430         /* 01 */ "Integer",
431         /* 02 */ "String",
432         /* 03 */ "Buffer",
433         /* 04 */ "Package",
434         /* 05 */ "FieldUnit",
435         /* 06 */ "Device",
436         /* 07 */ "Event",
437         /* 08 */ "Method",
438         /* 09 */ "Mutex",
439         /* 10 */ "Region",
440         /* 11 */ "Power",
441         /* 12 */ "Processor",
442         /* 13 */ "Thermal",
443         /* 14 */ "BufferField",
444         /* 15 */ "DdbHandle",
445         /* 16 */ "DebugObject",
446         /* 17 */ "RegionField",
447         /* 18 */ "BankField",
448         /* 19 */ "IndexField",
449         /* 20 */ "Reference",
450         /* 21 */ "Alias",
451         /* 22 */ "MethodAlias",
452         /* 23 */ "Notify",
453         /* 24 */ "AddrHandler",
454         /* 25 */ "ResourceDesc",
455         /* 26 */ "ResourceFld",
456         /* 27 */ "Scope",
457         /* 28 */ "Extra",
458         /* 29 */ "Data",
459         /* 30 */ "Invalid"
460 };
461
462 char *acpi_ut_get_type_name(acpi_object_type type)
463 {
464
465         if (type > ACPI_TYPE_INVALID) {
466                 return (ACPI_CAST_PTR(char, acpi_gbl_bad_type));
467         }
468
469         return (ACPI_CAST_PTR(char, acpi_gbl_ns_type_names[type]));
470 }
471
472 char *acpi_ut_get_object_type_name(union acpi_operand_object *obj_desc)
473 {
474
475         if (!obj_desc) {
476                 return ("[NULL Object Descriptor]");
477         }
478
479         return (acpi_ut_get_type_name(ACPI_GET_OBJECT_TYPE(obj_desc)));
480 }
481
482 /*******************************************************************************
483  *
484  * FUNCTION:    acpi_ut_get_node_name
485  *
486  * PARAMETERS:  Object               - A namespace node
487  *
488  * RETURN:      Pointer to a string
489  *
490  * DESCRIPTION: Validate the node and return the node's ACPI name.
491  *
492  ******************************************************************************/
493
494 char *acpi_ut_get_node_name(void *object)
495 {
496         struct acpi_namespace_node *node = (struct acpi_namespace_node *)object;
497
498         /* Must return a string of exactly 4 characters == ACPI_NAME_SIZE */
499
500         if (!object) {
501                 return ("NULL");
502         }
503
504         /* Check for Root node */
505
506         if ((object == ACPI_ROOT_OBJECT) || (object == acpi_gbl_root_node)) {
507                 return ("\"\\\" ");
508         }
509
510         /* Descriptor must be a namespace node */
511
512         if (ACPI_GET_DESCRIPTOR_TYPE(node) != ACPI_DESC_TYPE_NAMED) {
513                 return ("####");
514         }
515
516         /* Name must be a valid ACPI name */
517
518         if (!acpi_ut_valid_acpi_name(node->name.integer)) {
519                 node->name.integer = acpi_ut_repair_name(node->name.ascii);
520         }
521
522         /* Return the name */
523
524         return (node->name.ascii);
525 }
526
527 /*******************************************************************************
528  *
529  * FUNCTION:    acpi_ut_get_descriptor_name
530  *
531  * PARAMETERS:  Object               - An ACPI object
532  *
533  * RETURN:      Pointer to a string
534  *
535  * DESCRIPTION: Validate object and return the descriptor type
536  *
537  ******************************************************************************/
538
539 /* Printable names of object descriptor types */
540
541 static const char *acpi_gbl_desc_type_names[] = {
542         /* 00 */ "Invalid",
543         /* 01 */ "Cached",
544         /* 02 */ "State-Generic",
545         /* 03 */ "State-Update",
546         /* 04 */ "State-Package",
547         /* 05 */ "State-Control",
548         /* 06 */ "State-RootParseScope",
549         /* 07 */ "State-ParseScope",
550         /* 08 */ "State-WalkScope",
551         /* 09 */ "State-Result",
552         /* 10 */ "State-Notify",
553         /* 11 */ "State-Thread",
554         /* 12 */ "Walk",
555         /* 13 */ "Parser",
556         /* 14 */ "Operand",
557         /* 15 */ "Node"
558 };
559
560 char *acpi_ut_get_descriptor_name(void *object)
561 {
562
563         if (!object) {
564                 return ("NULL OBJECT");
565         }
566
567         if (ACPI_GET_DESCRIPTOR_TYPE(object) > ACPI_DESC_TYPE_MAX) {
568                 return (ACPI_CAST_PTR(char, acpi_gbl_bad_type));
569         }
570
571         return (ACPI_CAST_PTR(char,
572                               acpi_gbl_desc_type_names[ACPI_GET_DESCRIPTOR_TYPE
573                                                        (object)]));
574
575 }
576
577 #if defined(ACPI_DEBUG_OUTPUT) || defined(ACPI_DEBUGGER)
578 /*
579  * Strings and procedures used for debug only
580  */
581
582 /*******************************************************************************
583  *
584  * FUNCTION:    acpi_ut_get_mutex_name
585  *
586  * PARAMETERS:  mutex_id        - The predefined ID for this mutex.
587  *
588  * RETURN:      String containing the name of the mutex. Always returns a valid
589  *              pointer.
590  *
591  * DESCRIPTION: Translate a mutex ID into a name string (Debug only)
592  *
593  ******************************************************************************/
594
595 char *acpi_ut_get_mutex_name(u32 mutex_id)
596 {
597
598         if (mutex_id > ACPI_MAX_MUTEX) {
599                 return ("Invalid Mutex ID");
600         }
601
602         return (acpi_gbl_mutex_names[mutex_id]);
603 }
604 #endif
605
606 /*******************************************************************************
607  *
608  * FUNCTION:    acpi_ut_valid_object_type
609  *
610  * PARAMETERS:  Type            - Object type to be validated
611  *
612  * RETURN:      TRUE if valid object type, FALSE otherwise
613  *
614  * DESCRIPTION: Validate an object type
615  *
616  ******************************************************************************/
617
618 u8 acpi_ut_valid_object_type(acpi_object_type type)
619 {
620
621         if (type > ACPI_TYPE_LOCAL_MAX) {
622
623                 /* Note: Assumes all TYPEs are contiguous (external/local) */
624
625                 return (FALSE);
626         }
627
628         return (TRUE);
629 }
630
631 /*******************************************************************************
632  *
633  * FUNCTION:    acpi_ut_init_globals
634  *
635  * PARAMETERS:  None
636  *
637  * RETURN:      None
638  *
639  * DESCRIPTION: Init library globals.  All globals that require specific
640  *              initialization should be initialized here!
641  *
642  ******************************************************************************/
643
644 void acpi_ut_init_globals(void)
645 {
646         acpi_status status;
647         u32 i;
648
649         ACPI_FUNCTION_TRACE(ut_init_globals);
650
651         /* Create all memory caches */
652
653         status = acpi_ut_create_caches();
654         if (ACPI_FAILURE(status)) {
655                 return;
656         }
657
658         /* Mutex locked flags */
659
660         for (i = 0; i < ACPI_NUM_MUTEX; i++) {
661                 acpi_gbl_mutex_info[i].mutex = NULL;
662                 acpi_gbl_mutex_info[i].thread_id = ACPI_MUTEX_NOT_ACQUIRED;
663                 acpi_gbl_mutex_info[i].use_count = 0;
664         }
665
666         for (i = 0; i < ACPI_NUM_OWNERID_MASKS; i++) {
667                 acpi_gbl_owner_id_mask[i] = 0;
668         }
669         acpi_gbl_owner_id_mask[ACPI_NUM_OWNERID_MASKS - 1] = 0x80000000;        /* Last ID is never valid */
670
671         /* GPE support */
672
673         acpi_gpe_count = 0;
674         acpi_gbl_gpe_xrupt_list_head = NULL;
675         acpi_gbl_gpe_fadt_blocks[0] = NULL;
676         acpi_gbl_gpe_fadt_blocks[1] = NULL;
677
678         /* Global notify handlers */
679
680         acpi_gbl_system_notify.handler = NULL;
681         acpi_gbl_device_notify.handler = NULL;
682         acpi_gbl_exception_handler = NULL;
683         acpi_gbl_init_handler = NULL;
684
685         /* Global Lock support */
686
687         acpi_gbl_global_lock_semaphore = NULL;
688         acpi_gbl_global_lock_mutex = NULL;
689         acpi_gbl_global_lock_acquired = FALSE;
690         acpi_gbl_global_lock_handle = 0;
691
692         /* Miscellaneous variables */
693
694         acpi_gbl_cm_single_step = FALSE;
695         acpi_gbl_db_terminate_threads = FALSE;
696         acpi_gbl_shutdown = FALSE;
697         acpi_gbl_ns_lookup_count = 0;
698         acpi_gbl_ps_find_count = 0;
699         acpi_gbl_acpi_hardware_present = TRUE;
700         acpi_gbl_last_owner_id_index = 0;
701         acpi_gbl_next_owner_id_offset = 0;
702         acpi_gbl_trace_method_name = 0;
703         acpi_gbl_trace_dbg_level = 0;
704         acpi_gbl_trace_dbg_layer = 0;
705         acpi_gbl_debugger_configuration = DEBUGGER_THREADING;
706         acpi_gbl_db_output_flags = ACPI_DB_CONSOLE_OUTPUT;
707
708         /* Hardware oriented */
709
710         acpi_gbl_events_initialized = FALSE;
711         acpi_gbl_system_awake_and_running = TRUE;
712
713         /* Namespace */
714
715         acpi_gbl_root_node = NULL;
716         acpi_gbl_root_node_struct.name.integer = ACPI_ROOT_NAME;
717         acpi_gbl_root_node_struct.descriptor_type = ACPI_DESC_TYPE_NAMED;
718         acpi_gbl_root_node_struct.type = ACPI_TYPE_DEVICE;
719         acpi_gbl_root_node_struct.child = NULL;
720         acpi_gbl_root_node_struct.peer = NULL;
721         acpi_gbl_root_node_struct.object = NULL;
722         acpi_gbl_root_node_struct.flags = ANOBJ_END_OF_PEER_LIST;
723
724 #ifdef ACPI_DEBUG_OUTPUT
725         acpi_gbl_lowest_stack_pointer = ACPI_SIZE_MAX;
726 #endif
727
728 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
729         acpi_gbl_display_final_mem_stats = FALSE;
730 #endif
731
732         return_VOID;
733 }
734
735 ACPI_EXPORT_SYMBOL(acpi_dbg_level)
736     ACPI_EXPORT_SYMBOL(acpi_dbg_layer)
737     ACPI_EXPORT_SYMBOL(acpi_gpe_count)